The special status that some women's cults had in Roman religion - Vesta's virgins, Bona Dea's cult, the Isiac cult (though it accepted men as well) - is indeed interesting. I'm not sure what more could be said about it that hasn't already been said. However, I could see someone taking all of what has been said and putting it in one book for convenience.
Roman Women touched on some of these topics if you're interested.